Are per-artefact source JARs possible?

For the module configuration below, Buildship adds all designated JARs to the Eclipse Build Path, whether they are source JARs or not.
Source JARs were not assigned to the corresponding binary JARs.

When importing the Gradle project depending an this module, Buildship tries to load the following:
http://myownrepo.net/ivy/com.acme/dummy.lib/1.2.3/dummy.lib-1.2.3-sources.jar

Any idea what’s going wrong?

Thanks in advance
Peter

<?xml version="1.0"?>
<ivy-module xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:m="http://ant.apache.org/ivy/maven" version="2.0">
  <info organisation="com.acme" module="dummy.lib" revision="1.2.3">
    <description></description>
  </info>
  <configurations>
    <conf name="i486-windowsNT"/>
  </configurations>
  <publications>
    <artifact name="ALib-i486-windowsNT" type="jar" ext="jar" conf="i486-windowsNT"/>
    <artifact name="BLib-i486-windowsNT" type="jar" ext="jar" conf="i486-windowsNT"/>
    <artifact name="ALib-i486-windowsNT" type="source" ext="jar" conf="i486-windowsNT" m:classifier="sources"/>
    <artifact name="BLib-i486-windowsNT" type="source" ext="jar" conf="i486-windowsNT" m:classifier="sources"/>
  </publications>
  <dependencies/>
</ivy-module>